International Conference on Smart Innovation in Science and Engineering, Salalah, Oman, 7 - 08 April 2021, pp.30-31
This review describes the evolution of additively manufactured metal parts used in aircraft parts. Additive manufacturing (AM) or 3-D printing enables to manufacture of complex geometries that conventional manufacturing techniques cannot produce. These metal parts have been widely used in aircraft, aerospace, biomedical, and defense industries. It is commonly known that weight and cost reduction are among the most requested design expectations in the aviation industry. Parts used in aircraft are generally produced by machining of expensive engineering materials. AM permits an alternative to machining in the aviation industry, which is vital for reducing the economic and environmental aspects. Also, the microstructure of the AM metal parts can be controlled during manufacturing. Within the study, the metal AM process is classified into two categories: Laser powder bed fusion and directed energy deposition. Examples of AM metallic materials, including steel, titanium, aluminum, platinum, nickel, and their alloys, are represented. Further, the pros and cons of the AM over conventional manufacturing techniques (Machining, forming, welding, etc.) are discussed. Then, benefits of the topology optimization and design for AM methods along with the industrial applications are given. The utilization of AM as a repair technique is also demonstrated. Lastly, recent advances in the standardization of industrial AM processes are presented.